Bearing assemblies, apparatuses, and motor assemblies using the same
View Patent ↗Bearing assemblies, apparatuses, and motor assemblies using the same are disclosed. In an embodiment, a bearing assembly may include a plurality of superhard bearing elements distributed circumferentially about an axis. Each of the superhard bearing elements may include a bearing surface. At least one of the plurality of superhard bearing elements may include one or more grooves may be formed in the bearing surface thereof. The bearing assembly may also include a support ring that carries the superhard bearing elements.
1. A bearing assembly, comprising:
a plurality of superhard bearing elements distributed circumferentially about an axis, at least some of the plurality of superhard bearing elements including:
a first end surface and a second end surface positioned generally opposite the first end surface;
a first side surface extending between the first end surface and the second end surface;
a second side surface positioned generally opposite the first side surface;
a bearing surface extending between the first end surface, the second end surface, the first side surface, and the second side surface, the bearing surface including at least one groove formed therein that extends primarily longitudinally from the first end surface to at least an intermediate location between the first end surface and the second end surface, at least a portion of the at least one groove including a cross-sectional area at least partially defined between opposing sidewalls of the at least one groove, the cross-sectional area having a generally v-shaped geometry, a generally parabolic geometry, or a generally rectangular geometry; and
a support ring that carries the plurality of superhard bearing elements;
wherein no intersections are formed by the at least one groove.
2. The bearing assembly of claim 1 wherein the at least one groove extends to the second end surface.
3. The bearing assembly of claim 1 wherein the at least one groove includes at least one arcuate groove.
4. The bearing assembly of claim 1 wherein the at least one groove has a nonuniform depth.
5. The bearing assembly of claim 1 wherein the at least one groove is positioned and configured to pump lubricating fluid onto the bearing surfaces of one or more of the plurality of superhard bearing elements.
6. The bearing assembly of claim 1 wherein the at least one groove is configured to increase a surface area of the bearing surfaces in contact with lubricating fluid.
7. The bearing assembly of claim 1 wherein the at least one groove follows a generally curved path, a generally semi-cylindrical path, or combination thereof.
8. The bearing assembly of claim 1 wherein the at least one groove exhibits a length extending along a portion of the bearing surface and a depth extending between the bearing surface and a bottom portion of the at least one groove.
9. The bearing assembly of claim 8 wherein the length of the at least one groove is about forty (40) percent to about one hundred forty (140) percent of a length of the plurality of superhard bearing elements.
10. The bearing assembly of claim 8 wherein the length of the at least one groove is about four hundred (400) percent to eight hundred (800) percent of the depth of the at least one groove.
11. The bearing assembly of claim 1 wherein each of the at least some of the plurality of superhard bearing elements includes a substrate and a polycrystalline diamond table bonded to the substrate, the polycrystalline diamond table having a thickness.
12. The bearing assembly of claim 11 wherein a depth of the at least one groove is about ten (10) percent to one hundred twenty (120) percent of the thickness of the polycrystalline diamond table.
13. The bearing assembly of claim 12 wherein a depth of the at least one groove is about forty (40) percent to one hundred (100) of the thickness of the polycrystalline diamond table.
14. The bearing assembly of claim 1 wherein each of the at least some of the plurality of superhard bearing elements comprises a non-cylindrical superhard bearing element.
15. The bearing assembly of claim 1 wherein the axis is a thrust axis, and wherein the support ring and the plurality of superhard bearing elements define a thrust-bearing assembly; or wherein the axis is a rotation axis, and wherein the support ring and the plurality of superhard bearing elements define a radial bearing assembly.
16. The bearing assembly of claim 1 wherein the plurality of the superhard bearing elements are brazed, interference-fitted, or fastened to the support ring.
17. A bearing assembly, comprising:
a plurality of superhard bearing elements distributed circumferentially about an axis, at least some of the plurality of superhard bearing elements including:
a first end surface and a second end surface positioned generally opposite the first end surface;
a first side surface extending between the first end surface and the second end surface;
a second side surface positioned generally opposite the first side surface;
a bearing surface extending between the first end surface, the second end surface, the first side surface, and the second side surface, the bearing surface including at least one arcuate groove formed therein that extends primarily longitudinally from the first end surface to at least an intermediate location between the first end surface and the second end surface; and
a support ring that carries the plurality of superhard bearing elements;
wherein no intersections are formed by the at least one arcuate groove.
18. The bearing assembly of claim 17 wherein the at least one arcuate groove further extends to the second end surface.
19. A bearing apparatus, comprising:
a first bearing assembly;
a second bearing assembly; and
wherein at least one of the first bearing assembly or the second bearing assembly includes:
a plurality of superhard bearing elements distributed circumferentially about an axis, at least some of the plurality of superhard bearing elements including:
a first end surface and a second end surface positioned generally opposite the first end surface;
a first side surface extending between the first end surface and the second end surface;
a second side surface positioned generally opposite the first side surface;
a bearing surface extending between the first end surface, the second end surface, the first side surface, and the second side surface, the bearing surface including at least one groove formed therein that extends primarily longitudinally from the first end surface to at least an intermediate location between the first end surface and the second end surface, at least a portion of the at least one groove including a cross-sectional area at least partially defined between opposing sidewalls of the at least one groove, the cross-sectional area having a generally v-shaped geometry, a generally parabolic geometry, or a generally rectangular geometry; and
a support ring that carries the plurality of superhard bearing elements;
wherein no intersections are formed by the at least one groove.